Welding of titanium alloys
Welding titanium alloy material, the electron beam welding is a high-energy beam of advanced processing technology, has the advantage of other traditional welding methods can not match. Because titanium alloy electron beam welded components hydrogen and cyclic stresses present in the environment of use, welding components hydrogen induced fracture may occur, therefore Effect of hydrogen on the electron beam welded joint fatigue performance is very important. As a new type of solid-phase connection technology, linear friction welding has a high quality, efficient, materials, pollution-free series of advantages, but also the presence of linear friction welding technology welding large tonnage, equipment manufacturing complex issue, limiting its Applications.
Titanium hydrogenation process is to hydrogen as a temporary alloying elements, by changing the phase composition and microstructure of titanium, titanium alloys and thus achieve the purpose of improving performance. Application of this technology may allow sub play titanium materials processing performance and reduce alloy molding equipment capabilities. With the increase of hydrogen content, Gr5 titanium tissue content of primary α phase decreased, the content of β phase is gradually increased, the number of twins increased significantly. Hydrogen TC4 influence of base metal and weld fracture surface of a titanium alloy sample is basically the same, in the pre-split plot, with increasing hydrogen content, the second increase in the number of cracks.